When should an administrator use the DSCHECK command line utility?

When should an administrator use the DSCHECK command line utility?

A.
To fix errors on server entries in the data store

B.
To fix errors related to configuring Proxy Authentication

C.
To fix errors in the local host cache on each XenApp 6.5 server

D.
To generate a report of logon/logoff activity for a XenApp 6.5 server